For those eagerly awaiting the commencement of the third annual Dota 2 International Championships, Valve has revealed a supplement to the tournament in the way of the Interactive Compendium
. Available for $10, the compendium will deliver various news on the tournament but also allow you to play games with other fans for fun and bragging rights.
The Interactive Compendium is also offering those who purchase the virtual book "special virtual item drops throughout the tournament," but also allowing you to vote on tournament-related community polls, such as the selection of which player should receive awards based on their play in the tournament. Valve has also revealed that for every purchase of an Interactive Compendium, 25% of the price will go directly into the prize pool which is currently at a base of $1.6 million.